JLG 4017 Service Manual - Manual (Page 80)

Transmission:
6.4 4017
6.6.1 Transmission Removal
1. Park the machine on a firm, level surface, fully
retract the boom, lower the boom, place the
transmission control lever in the (N) NEUTRAL,
engage the park brake and shut the engine OFF.
2. Place an Accident Prevention Tag on both the
ignition key switch and steering wheel, stating that
the machine should not be operated.
3. Open the engine cover and allow the system fluids to
cool.
4. Remove engine cover.
5. Remove belly pan from under engine.
6. Drain the hydraulic oil reservoir. Refer to Section 8.5,
“Hydraulic Reservoir.”
7. Disconnect both battery cables and remove the
battery.
8. Thoroughly clean the transmission and surrounding
area, including all hoses and fittings, before
proceeding.
9. Place a suitable receptacle under the transmission
drain plug. Remove the transmission drain plug (1),
and allow the transmission oil to drain into the
receptacle. Repeat drain procedure with the drop
box (2).
10. Transfer the used transmission oil into a suitable,
covered container, and label the container as “Used
Oil.” Dispose of used oil at an approved recycling
facility. Clean and reinstall the transmission and drop
box drain plug.
11. Remove the drive shafts. Refer to Section 5.4.3,
“Drive Shaft Removal.”
12. Remove air cleaner unit and intake tubes.
13. Remove the hydraulic pump. Refer to Section 8.6.3,
“Pump Replacement.”
14. Label and disconnect the transmission temperature
switch connector and shift solenoid wiring harness
connectors.
15. Label, disconnect and cap the transmission oil
cooler inlet and outlet hoses at the transmission. The
transmission oil cooler outlet hose, routed to the
lower radiator fitting, is located on the top of the
transmission. The transmission oil cooler inlet hose,
routed to the upper radiator fitting, is located on top
of the transmission.
16. Remove the access plug from side of the engine bell
housing. This will allow access to remove the eight
bolts holding the flex plate to the engine flywheel.
17. Turn the engine over slowly by hand and align each
of the eight flex plate bolts to be accessed. Remove
them one at a time.
18. Wipe up any spilled hydraulic and transmission oil.
19. Connect a lifting strap or chain to the lifting eye at
the top of the transmission, and to a suitable hoist or
overhead crane. Operate the hoist or crane to
remove slack from the chain, but DO NOT raise the
transmission at this time.
20. Place blocks under rear of engine for support
BEFORE transmission mounts are removed
21. Place blocks under the transmission to help support
it during removal.
22. Remove both rear transmission mount bolts and
lockwashers securing the transmission mount to the
frame.
WARNING:
Risk of severe personal
injury. NEVER lift a transmission alone; enlist
the help of at least one assistant or use a
suitable hoist or overhead crane and sling.
MZ1380
1
2
MZ1330